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Satin chrome mortise lock with round knob and rectangular trim plate, right-hand reverse orientation

Marks USA

Marks USA 21AC/26D-W-RH Satin Chrome Right Hand Reverse Double Cylinder Mortise Door Lock

SKU CH-6K27-0HZPW MPN 21AC/26D-W-RH

Satin chrome double-cylinder mortise lockset with through-bolted Unilock knob trim for out-swinging right-hand-reverse doors

  • Location typeRight Hand Reverse (For Out-Swinging Door)
  • Backset distance2-1/2 in
  • Lock keyingKeyed Different
  • Main functionDouble Cylinder
  • Surface finishSatin Chrome
  • Sold asBox
  • Right-hand reverse suits out-swinging doors
  • Double-cylinder function needs a key on both sides
  • Through-bolted solid brass trim resists forced entry
  • Satin chrome finish protects against corrosion
  • 1-inch deadbolt throw strengthens the lock point

Product Identity

The Marks USA 21AC/26D-W-RH is a satin chrome mortise lockset designed for out-swinging doors. Its right-hand reverse configuration and ornamental Unilock knob provide a secure, commercial-grade entry solution for steel gates and security storm doors.

Critical Specification

The double-cylinder function requires a key to operate the 1" deadbolt from both sides. This specification determines whether the lock meets egress requirements for your specific application and local building codes.

Installation Context

The lock fits doors between 1-3/8" and 1-3/4" thick with a 2-1/2" backset. Through-bolted knob plate assemblies anchor directly through the door. Two mortise cylinders and all mounting hardware are included, though the reversible design also accommodates left-hand doors if handing is changed during installation.

How it compares

Measured against everything we stock in Door Lock Sets & Deadbolts, at today’s prices. Recalculated every night.

Price $163.99
Pricier than about 79% of the 2,145 comparable items (median $55.99).

Specifications

Product
Brand nameMarks
Product line21AC/26D-W-R
Model name21AC/26D-W-RH
Product typeOrnament Unilock Knobe Mortise Lockset
Design styleKnobs
Size & build
Surface finishSatin Chrome
Main materialBrass
Backset distance2-1/2 in
More details
Location typeRight Hand Reverse (For Out-Swinging Door)
Lock keyingKeyed Different
Main functionDouble Cylinder

Questions about this item

How does the 2-1/2" backset affect where the lock sits on my door?

The 2-1/2" backset places the cylinder centre 2-1/2 inches from the door edge, so the mortise pocket must be cut at that distance for the lock body to align.

What does the double-cylinder function mean for daily use?

Both sides require a key to operate the deadbolt; the latchbolt retracts by knob inside, but locking or unlocking the bolt always needs a key.

What door thickness range does the mortise body accommodate?

The lock fits doors from 1-3/8" to 1-3/4" thick; the through-bolted trim assemblies clamp securely across that range.

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